4455621 has 16 divisors (see below), whose sum is σ = 6715200. Its totient is φ = 2919024.

The previous prime is 4455611. The next prime is 4455631. The reversal of 4455621 is 1265544.

It is an interprime number because it is at equal distance from previous prime (4455611) and next prime (4455631).

It is not a de Polignac number, because 4455621 - 2¹¹ = 4453573 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4455611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195 + ... + 2991.

It is an arithmetic number, because the mean of its divisors is an integer number (419700).

Almost surely, 2^4455621 is an apocalyptic number.

It is an amenable number.

4455621 is a deficient number, since it is larger than the sum of its proper divisors (2259579).

4455621 is a wasteful number, since it uses less digits than its factorization.

4455621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2865 (or 2859 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 4455621 is about 2110.8341952887. The cubic root of 4455621 is about 164.5518417057.

It can be divided in two parts, 4 and 455621, that added together give a square (455625 = 675²).

The spelling of 4455621 in words is "four million, four hundred fifty-five thousand, six hundred twenty-one".